获取dataGrid 行
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using System.Windows.Controls; using System.Windows.Controls.Primitives; using System.Windows.Media; namespace Splash.WPF { public static class DataGridPlus { /// <summary> /// 获取DataGrid控件单元格 /// </summary> /// <param name="dataGrid">DataGrid控件</param> /// <param name="rowIndex">单元格所在的行号</param> /// <param name="columnIndex">单元格所在的列号</param> /// <returns>指定的单元格</returns> public static DataGridCell GetCell( this DataGrid dataGrid, int rowIndex, int columnIndex) { DataGridRow rowContainer = dataGrid.GetRow(rowIndex); if (rowContainer != null ) { DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer); DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex); if (cell == null ) { dataGrid.ScrollIntoView(rowContainer, dataGrid.Columns[columnIndex]); cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex); } return cell; } return null ; } /// <summary> /// 获取DataGrid的行 /// </summary> /// <param name="dataGrid">DataGrid控件</param> /// <param name="rowIndex">DataGrid行号</param> /// <returns>指定的行号</returns> public static DataGridRow GetRow( this DataGrid dataGrid, int rowIndex) { DataGridRow rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex); if (rowContainer == null ) { dataGrid.UpdateLayout(); dataGrid.ScrollIntoView(dataGrid.Items[rowIndex]); rowContainer = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromIndex(rowIndex); } return rowContainer; } /// <summary> /// 获取父可视对象中第一个指定类型的子可视对象 /// </summary> /// <typeparam name="T">可视对象类型</typeparam> /// <param name="parent">父可视对象</param> /// <returns>第一个指定类型的子可视对象</returns> public static T GetVisualChild<T>(Visual parent) where T : Visual { T child = default (T); int numVisuals = VisualTreeHelper.GetChildrenCount(parent); for ( int i = 0; i < numVisuals; i++) { Visual v = (Visual)VisualTreeHelper.GetChild(parent, i); child = v as T; if (child == null ) { child = GetVisualChild<T>(v); } if (child != null ) { break ; } } return child; } } }
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